About

About

Readability · Efficiency · Optimization · Modern tooling — a frontend engineer who keeps all four on the same scale.

Since mid-2024 I write almost every line of new products in pair programming with Claude AI agents. My job is to decide what to build, how to design it, and how to keep readability and efficiency intact — and to verify the result. Who typed the code matters less than whether the result is fast, clean, and easy for the next person to read.

I was the first in my company to push for AI-agent adoption, and I ran the in-house Claude workshop that changed how the team works. Migrations and rebuilds that used to collapse mid-flight before AI now reliably reach the finish line — the MeetMate v4 rebuild, completed in one month with no service downtime, is the clearest example.

Whether the codebase is in production or brand new, I spend most of my time pinning builds, bundle budgets, directory boundaries, regression tests and accessibility into CI guards. Shipping to real users and keeping things working for them matters to me as much as building. In 2026 I launched the MeetMate mobile app on the App Store and Google Play for the first time and shipped through 1.0.5 in five weeks, and I took over an LMS codebase that several people had built over two years, which I now run on my own. Underneath all of it are the fundamentals I built by hand on ClassMate (2023, hand-written before AI).

Skills

Tools I Work With

Languages
TypeScript · JavaScript · HTML · CSS · SCSS
Frameworks
React 19 · React Native · Next.js 14 · Astro
State & Data
Zustand · TanStack Query · Jotai · React Hook Form · Zod
Styling
Tailwind CSS · styled-components · Emotion + MUI · SCSS Modules · Vanilla Extract
Realtime / Media
lib-jitsi-meet (WebRTC SFU) · react-native-webrtc · WebSocket · Server-Sent Events · Web Audio API · TFLite WASM · three.js
Build & Tooling
Vite + SWC · Turborepo · pnpm workspaces · Webpack · Biome · Lefthook · Jenkins · R8 · Hermes
Testing
Vitest · Jest · Testing Library · Playwright · Maestro · XCUITest · axe-core
AI / Workflow
Claude AI agent pair programming · AI-orchestrated migrations · Led in-house AI adoption + seminar
Practices
Feature-Sliced Design · Suspense-first · Accessibility (WCAG 2.1/2.5) · Bundle-budget CI guards · Regression-test invariants · App Store / Play launch & review
Experience

Experience

2022.10 — Present

Frontend Engineer · Querensys

I have owned the frontend across six products. The core of my solo work: two years running the NMS-Web frontend on my own; sole frontend ownership of both the web and mobile clients of the MeetMate video-conferencing platform (the mobile app first launched on the stores in 2026.08); and running an academy LMS web app on my own since taking it over in 2026.06. On ClassMate (2023, hand-written) and CBR (a RAG chatbot) I was one member of the team and owned specific areas (permissions, notifications, SSE streaming and more). Since mid-2024 pair programming with Claude AI agents has been my standard way of working, and I was the first to push for AI adoption in the company, running the in-house Claude workshop.

Talks · Materials

Talks · Materials

Preview of the first slide of the Claude AI Agent seminar
2025.04 · In-house seminar

Working with Claude AI Agents — Seminar

I presented a workflow for integrating Claude into production code, along with real-world cases, to the in-house development team. It became the starting point for AI-agent adoption at the company and the turning point that moved new work — NMS, MeetMate, CBR and more — onto AI pair programming.

Materials are in Korean.

Contact

Contact

Email devgihonghong@gmail.com
Location Seoul, South Korea